[runtime] Introduce dedicated JSBoundFunction to represent bound functions.

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
diff --git a/src/arm/code-stubs-arm.cc b/src/arm/code-stubs-arm.cc
index 381eb1471c136bcdf4db425f880373a818077c08..18f249b200078f1ad69d099fd6026a8d17568eb4 100644
--- a/src/arm/code-stubs-arm.cc
+++ b/src/arm/code-stubs-arm.cc
@@ -1346,16 +1346,6 @@ void InstanceOfStub::Generate(MacroAssembler* masm) {
   __ tst(scratch, Operand(1 << Map::kHasNonInstancePrototype));
   __ b(ne, &slow_case);
 
-  // Ensure that {function} is not bound.
-  Register const shared_info = scratch;
-  __ ldr(shared_info,
-         FieldMemOperand(function, JSFunction::kSharedFunctionInfoOffset));
-  __ ldr(scratch, FieldMemOperand(shared_info,
-                                  SharedFunctionInfo::kCompilerHintsOffset));
-  __ tst(scratch,
-         Operand(Smi::FromInt(1 << SharedFunctionInfo::kBoundFunction)));
-  __ b(ne, &slow_case);
-
   // Get the "prototype" (or initial map) of the {function}.
   __ ldr(function_prototype,
          FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset));